Did he say he would tighten it for you? Did he say that was included in his quote or did he suggest it would cost you extra?
As far as being normal.... There are a lot of Parkers out there that are loose with the forend off and are tight with the forend on. I don't believe they left the factory that way so I guess you could say that as far as a new gun was concerned, it is not normal.
I think you and your gunsmith should have made a decision as to what you expected of him and a breakdown, or itemization, of his services.
What he apparently did was to tighten up the forend on the loop (or forend lug) but I'll bet there is some excessive clearance between the breech face and the breech of the barrels. This is called being "off the face" and will probably only get worse.
Without actually seeing the gun I am only making assumptions.... and we all know what that makes me
